Mysterious tunnels in desert rocks may be the work of unknown microbes, hinting at a hidden world inside marble and limestone ...

For most organisms on Earth, rocks are objects, not food. But for one oddball microbe, desert limestone seems to have been on ...

In the desert areas of Namibia, Oman, and Saudi Arabia, research work has revealed unusual structures that are probably due ...

The Hildreths paused to note places where delicate fossils of prehistoric sea snails remain etched in limestone boulders. The ninety-minute tour took us to two sites within close proximity ...

Limestone is dissolved very slowly over a period of time. Erratics at Norber are boulders of gritstone standing on a plinth of limestone. The boulders protect the limestone from chemical weathering.

Where limestone lies on top of an impermeable rock along a valley there can be several springs formed along the intersection of the two rocks. This is a spring line. The ice sheet which covered ...